Lol please, you guys hate them and call them "Gallas". They are not Habesha at all. They don't speak Ethio-Semitic, they don't have South Arabian DNA in them nor were they ever part of Abyssinia, historically speaking. Oromos were colonized by Amhara who were armed by the British. You know Ethiopia was made up based on imperialism. The only Horners who resisted it were the Somalis and they defeated Menelik forces in the Battle of Luuq, Battle of Ferfer not to mention Dervish State repelled Ethiopian forces multiple times even with the European support. The only reason why you control the Somali region is because the British gave it to you but one day Somalia will take it back even if it means by war or referendum. The fact is the Somali region is occupied and it will soon be free.
Somalis will always despise Ethiopia and peace will never exist until the Somali territory Ethiopia is occupying becomes free. Oromos have been brainwashed into Ethiopianism even though their ancestors were brutally conquered by the Abyssinians but we Somalis don't fall for your tricks and you will see our wrath when our country comes back.
You're a bit off there, buddy.
It was not as simple as amhara Vs oromo, it was shoa(which is mixed with oromo amhara and gurage) and wollo against the rest of Ethiopia pretty much with some regions submitting peacefully, in exchange for paying a tribute yearly.
Ethiopian politics were more province based than ethnic based.
Shoan amhara and shoan oromo fought both other amhara and other oromo groups, such as the gojjame amhara and arsi oromo.
Gojjam despite being Amharic speaking too, didn't wanna be ruled by shoan Amharic speakers, because they were two different provinces. Amhara nationalism is very much new and still in its infancy today.
Certain oromo groups were settling in Abyssinia before it expanded and became Ethiopia.
They're not habesha in origin, you're right, but have been living with them so long, they can be considered as habesha or Abyssinian.